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<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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<body>
  <script>
    console.log(2 <= 1);//true

    console.log('1' == 1);//true
    console.log('1' != 1);//false

    //------------

    console.log('1' === 1);//false
    console.log('1' !== 1);//true

  </script>
</body>

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